I am a 58 year old African American male who is feeling the effects of aging after almost 50 years of competitive sports including football, wrestling, biking, weight lifting, bodybuilding, track, long distance running and even swimming. I had prostate cancer back in 2000 which went into remission after radiation and chemotherapy treatment. My natural testosterone level is kept suppressed through continuing hormone therapy, because higher levels of testosterone would put me at risk of a recurrence of the prostate cancer. With N1-T I've achieved greater endurance, more strength and quicker recovery with no appreciable change in my PSA levels. I've been taking 2 capsules twice per day and there has been notable improvement. However, I also other supplements. I've tried a lot of combinations over the years, including pharmaceutical anabolics. The current combination has proven to be safe and effective. I would have given it 5 stars, but the long term use has not been tested.